Accès membres

Mot de passe perdu? S'inscrire

04-06-2020 00:44

Juuso Äikäs

These I found from a dead Equisetum stem in a mois

05-04-2020 18:59

Andgelo Mombert Andgelo Mombert

Bonsoir, Un sympathique pyréno observé sur Vibu

03-06-2020 11:35

Castillo Joseba Castillo Joseba

Tengo una muestra de Hypoxylon subticinense en hum

01-06-2020 16:39

Andgelo Mombert Andgelo Mombert

Bonjour, Un dernier pour aujourd'hui. Sur tige m

24-05-2020 22:36

Joop van der Lee

The reason why I post all these different characte

02-06-2020 20:56

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branche morte de Ribes petraeum, sur

01-06-2020 15:33

Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte de Laburnum anagyroide

01-06-2020 18:19

Philippe  Larue Philippe Larue

Bonjour à tous, Est-il possible de déterminer,

01-06-2020 16:41

Hardware Tony Hardware Tony

At first I felt this was edging towards S. stellat

01-06-2020 15:51

Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte décortiquée de Salix

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Unguiculariopsis-like, but...
Michel Hairaud, 12-04-2019 14:11
Michel Hairaud

Bonjour,


Voici une Helotiale manifestement liée au pyrenomycète Camarosporidiella laburni (det. A. Gardiennet) et qui évoque donc un Unguiculariopsis.


Mais ! Les caractères micro ne sont guère compatibles avec le genre, voire peut être même avec la famille des Cordieritidaceae ??


ApOthecia up to 2,5 mm . gregarious, Ascus H- and IKI - 75-95 µm. PS 30 µm Spores cylindrical to slightly allantoid, OCI 1-1,5 . 11-13 x 2,8-31 µm. PAraphyses rather lanceolate, septate, covered with amorphic hyaline matter , with no VB visible in water but some patches are stained in CRB.


Medulla T. intricata of almost parallel hyphes x 2-3 µm . Ectal of globose cells x6-12 µm covered with amorphic red-brown matter.  Margin hairs up to 150 µm x 3-7 , walls red-brown and granulous as in LAchnum (!) , which can be seen after KOH or in Congo Red. KOH dissolves the brown pigment . No ionomidotic reaction, no cristals.


Toute aide sera bienvenue. Amitiés. Michel

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Hans-Otto Baral, 15-04-2019 08:22
Hans-Otto Baral
Re : Unguiculariopsis-like, but...
Hi Michel
not easy case! But you say the brown pigment dissolves in KOH. If so, it should extrude in the medium, does it? But you say "not ionomidotic"?

could you show some hairs in closeup to better see the warts?

Various characters tell agains Unguiculariopsis, including absence of croziers, warted sublanceolate paraphyses, dissolvable pigment, and hair features. But the family I think is correct.
Zotto
Michel Hairaud, 17-04-2019 09:28
Michel Hairaud
Re : Unguiculariopsis-like, but...
Thanks, Zotto.

As the hairs are strongly agglutinate , I tried KOH to gain visibility but may be the pigments are not actually dissolved. I do not notice that they extrude .


here is a comparison between KOH 5% and tap water. I also tried closeups . These warts seem not firmly fixed to hair walls.


Michel

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Hans-Otto Baral, 17-04-2019 09:40
Hans-Otto Baral
Re : Unguiculariopsis-like, but...
O.k., so non-ionomidotic. I see a little similarity with what I call "aff. Hyphodiscus" (viridula, "sericea") but which genetically belongs in Cordieritidaceae. From this your fungus differs in wider, almost sublanceolate, rough paraphyses. I think a relationship with this family is quite probable. A genetic result would be interesting.
Michel Hairaud, 20-04-2019 12:36
Michel Hairaud
Re : Unguiculariopsis-like, but...

I wonder why my answer does not appear...


Yes Zotto, the comparison shows similarity.


A sequence is sheduled. Hope we can get a clear result.


THanks again . Michel